Gadreel, the Miracle-Purge

Expel {6} (If you would roll this card from the Chaos
Library, instead, exile it. As long as it remains exiled,
you may cast it for it's expel cost)
Flying, deathtouch, lifelink
When Gadreel, the Miracle-Purge enters the battlefield, you may have two target players
exchange life totals. Then, destroy all other
creatures and planeswalkers.